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11.
Marc Fadel Frédéric Ledoux Mariana Farhat Adib Kfoury Dominique Courcot Charbel Afif 《环境科学学报(英文版)》2021,33(3):98-116
Primary and secondary organic aerosols in PM2.5 were investigated over a one-year campaign at Zouk Mikael and Fiaa, Lebanon. The n-alkanes concentrations were quite similar at both sites (26-29 ng/m3) and mainly explained by anthropogenic emissions rather than natural ones. The concentrations of total Polycyclic Aromatic Hydrocarbons (PAHs) were nearly three times higher at Zouk Mikael (2.56 ng/m3) compared to Fiaa (0.95 ng/m3), especially for indeno[1,2,3-c,d]pyrene linked to the presence of the power plant. A characteristic indeno[1,2,3-c,d]pyrene/(indeno[1,2,3-c,d]pyrene + benzo[g,h,i]perylene) ratio in the range 0.8-1.0 was determined for heavy fuel oil combustion from the power plant. Fatty acids and hopanes were also investigated and were assigned to cooking activities and vehicular emissions respectively. Phthalates were identified for the first time in Lebanon with high concentrations at Zouk and Fiaa (106.88 and 97.68 ng/m3 respectively). Moreover, the biogenic secondary aerosols revealed higher concentrations in summer. The total terpene concentration varied between 131 ng/m3 at Zouk Mikael in winter to 469 ng/m3 at Fiaa in summer. Additionnally, the concentrations of the dicarboxylic acids especially for adipic and phthalic acids were more influenced by anthropogenic sources.The analysis of molecular markers and diagnostic ratios indicated that the sites were strongly affected by anthropogenic sources such as waste open burning, diesel private generators, cooking activities, road transport, power plant, and industrial emissions. Moreover, results showed different pattern during winter and summer seasons. Whereas, higher concentrations of biogenic markers were clearly encountered during the summer period. 相似文献
12.
Fate Modelling of DEHP in Roskilde Fjord, Denmark 总被引:1,自引:0,他引:1
Patrik Fauser Jørgen Vikelsøe Peter B. Sørensen Lars Carlsen 《Environmental Modeling and Assessment》2009,14(2):209-220
The fate of di(2-ethylhexyl)phthalate (DEHP) is modeled in Roskilde fjord, Denmark. The fjord is situated near Roskilde, which
comprises 80,000 PE, various industries, a central wastewater treatment plant, and adjacent agricultural fields. Roskilde
fjord is thus a suitable recipient for studying the transport and fate of DEHP, which is used in a variety of different industries
and consumer products. Wastewater from households and industries is led to the local wastewater treatment plant, which leads
the effluent to the fjord. The sludge is partly stored and partly amended on an adjacent field. The model applied in the present
study is a simple box model coupling water and sediment compartments of the fjord with wastewater treatment plant effluent,
streams leading to the fjord, and atmospheric deposition. The fjord model comprises first-order degradation, adsorption, sedimentation,
vertical diffusion in the sediment, dispersive mixing in the water, and water exchange with the surrounding sea. Experimental
measurements of DEHP were made in the fjord water and sediment, in the wastewater treatment plant inlet and effluent, and
in streams and atmospheric deposition. The experimental data are used to calibrate the model. The model results show that
freshwater from streams is the predominant DEHP source to the fjord, followed by atmospheric deposition and effluents from
wastewater treatment plants. Sedimentation is the predominant removal mechanism followed by water exchange with the sea and
degradation. 相似文献
13.
Cristiana Guerranti Alessandro Cau Monia Renzi Simone Badini Eleonora Grazioli Guido Perra 《Journal of environmental science and health. Part. B》2016,51(10):661-667
Atlantic blue fin tuna (Thunnus thynnus) is a species of great importance for Mediterranean Sea area, from both ecological and commercial points of view. The scientific literature reports few data on the contamination of this fish by emerging organic compounds such as perfluorinated alkylated substances(PFASs) and phthalates, being the latter never been studied in tuna. This study therefore investigated the presence of the PFASs perfluorooctane sulphonate (PFOS) and perfluoroctanoic acid (PFOA) and the phthalate di-2-ethylhexyl phthalate (DEHP), also monitored by its metabolite mono-2-ethylhexyl phthalate(MEHP), to assess both the state of contamination of Atlantic bluefin tuna specimen and the risk due to the toxicity of these compounds for human consumption. While PFOA was never found, detectable levels of PFOS (0.4–1.88 ng/g), DEHP (9–14.62 ng/g) and MEHP (1.5–6.30 ng/g) were found. The results were elaborated relating the accumulation to the size and age of the individuals and showed a correlation between the levels of different pollutants investigated. 相似文献
14.
本试验是针对温度对厌氧降解邻苯二甲酸二酯影响的研究 ,目的是寻找适应这种反应的最佳温度或最佳温度区间。研究表明 ,对于原始污泥来说 ,最佳温度是其所生存的原始温度 ,即消化处理温度 3 7℃ ,对于污泥和填埋场渗出液的富集菌群来说 ,由于人工选择培养的介入 ,最佳温度有向高温偏移的趋势 相似文献
15.
GC-MS测定土壤中酞酸酯类化合物 总被引:4,自引:2,他引:2
采用毛细管柱气相色谱-质谱联用选择离子检测(GC-MS-SIM)技术,结合快速萃取和佛罗里硅土柱净化方法分析土壤中的六种酞酸酯类(PAEs)化合物。结果表明,六种PAEs峰形好,平均加标回收率为76.7%~110%,相对标准偏差为2.5%~4.5%。方法具有操作简便、回收率高、纯化效果好和对环境友好的特点,且具有很强的实用性。 相似文献
16.